Take the clasp in your non-dominate hand. Use the knife with your dominate hand. Insert the tip of the knife into the side of the clasp and gently twist the knife to increase the distance between the top and bottom of the clasp. Open and close the clasp after each twist to check if it is working properly.
Full Answer
What is clasp knife deformity?
The term of clasp-knife deformity was coined by G.W. Henry in 1958 as an analogy to the blade of a pocket (clasp) knife folding into its handle 3,4.
Who coined the term clasp-knife deformity?
The term of clasp-knife deformity was coined by G.W. Henry in 1958 as an analogy to the blade of a pocket (clasp) knife folding into its handle 3,4. References 1. Chew FS. Skeletal Radiology.
What is a clasp knives response?
It is one of the characteristic responses of an upper motor neuron lesion. It gets its name from the resemblance between the motion of the limb and the sudden closing of a claspknife after sufficient pressure is applied.
Is the clasp knife reflex a tendon reflex?
More recent work strongly suggests that tendon organs are not involved in the clasp knife reflex, but that other sensory receptors in muscles are responsible. Passive flexion of elbow meets immediate resistance due to stretch reflex in the triceps muscle.
What is clasp knife syndrome?
When a clasp-knife deformity is accompanied by pain on extension secondary to protrusion of the enlarged spinous process (knife blade) into the sacral spinal canal, it is called clasp-knife syndrome 2 , also known as spina bifida engagement syndrome.
When was the clasp knife invented?
The term of clasp-knife deformity was coined by G.W. Henry in 1958 as an analogy to the blade of a pocket (clasp) knife folding into its handle 3,4.
What is the midline defect of the posterior arch of the sacrum?
It is characterized by a large midline defect of the posterior arch of the sacrum (usually S1/S2 and occasionally S3) along with hypertrophy (or overgrowth) of the spinous process of the vertebra above (usually L5) 1-2.
How to fix a clasp that won't stay shut?
If the clasp will not stay shut, you can use a clamp, or small hammer to gently compress the clasp to reduce the distance between the top and bottom of the clasp. Go slowly and gently with this repair. Too much hammering, or vigorous hammering could break the clasp, or result in a stuck clasp. If your free moving clasp is now stuck refer ...
How to get hair out of a clasp?
Use a small container, something like a medicine cup, or soda lid to help free the clasp. Fill your small container with bleach. Set the clasp in the bleach and set a timer for 10 minutes. When time is up get a pair of plastic gloves, check and see if the clasp is hair free. If it is not, return the clasp to the bleach for another 5 minutes.
How to stop hair tangles on necklace?
To prevent hair-tangle from happening again, put on your necklace then wrap the clasp with a small piece of clear tape. If the clasp is still stuck check tips 3 and 4 for possible solutions.
How to remove sweater fluff?
If sweater fluff is the culprit, you can use a safety pin to gently and carefully remove the fluff. Insert the safety-pin into the back of the clasp, where it attaches to the chain, and push and fluff through the clasp and out the other side.
What is a Clasp Knife response?
Clasp-knife response refers to a Golgi tendon reflex with a rapid decrease in resistance when attempting to flex a joint, usually during a neurological examina tion. It is one of the characteristic responses of an upper motor neuron lesion.
Does stretching the triceps increase resistance?
As the muscle tone increases, resistance against flexion of the limb increases as well. However, when flexion is continued, further stretching of the triceps muscle activates an inverse stretch reflex that relaxes the muscle due to autogenic inhibition.
What causes boutonniere deformity?
It causes the middle joint of your finger to bend in, and the outermost joint to bend out. It’s also called a central slip injury. It’s often caused by rheumatoid ar thritis. Other possible causes include:
What to do if boutonniere is swollen?
If your boutonniere deformity is due to rheumatoid arthritis or osteoarthritis, wearing a splint and doing strengthening exercises may not be enough. You doctor may instead prescribe medication, including corticosteroid injections to reduce inflammation and swelling.
How long do you have to wear a splint?
You’ll likely need to wear the splint continuously for three to six weeks.
